In a world where the technological landscape is being revolutionised by a new approach of Industry40 predictive maintenance, the ELPROMA helps guarantee a longterm synchronisation stability of  any modern IT. To clarify, we are network time synchronisation. experts with 30years experience. Our IEEE1588 grandmasters and NTP servers are designed to keep SLAVE clocks highly stable and time accurate. Why it is important ? For instance, the time reminds essential  for critical infrastructures: 5G, smart-grids, AVB broadcasting , autonomous-vehicles. Moreover synchronisation is now  a part of cyber-security. Time is invisibly conducting all our live. Robust synchronisation  is essencial for new Ethernet Time Sensitive Networking (TSN).